🚀 go-pugleaf

Title: Implicit DO extension

Advocate: Hokey <hokey@plus5.com>

History: 20 Mar 88 - Submitted

Abstract:
	A simple extension to the implicit DO command is presented.
	This extension allows invocation of an implicit subroutine
	with the same ease as that of an explicit subroutine, including
	post-conditionalization.  It is easily extensible to allow for both
	parameter passing and implicit extrinsic function access.

Proposal: (Page and section numbers are from X11/SC1/88-14)
	Amend 3.6.3 as follows:

	Replace:

				| [ SP ]          |
		D[O] postcond	| SP L doargument |

	with:

				| | $$ postcond | |	Note: Implicit DO
		D[O] postcond	| | [ SP ]      | |	Note: Implicit DO
				| SP L doargument |	Note: Explicit DO
	
	Replace first three words of first paragraph:

		An argumentless DO ...

	with:
		An implicit DO ...

	Delete the second sentence:

		If postcond is present and false, the execution if the command
		is complete.

	Note that this sentence was incorrect regardless.

	Replace last three words of first paragraph:

		... the argumentless DO.

	with:
		... the implicit DO.
	
	Replace the first three words of the second paragraph:

		DO with arguments...

	with:
		An explicit DO ...

-- 
Hokey